Key features
- 95 dB SPL 1W / 1m average sensitivity
- 51mm (2 in) Interleaved Sandwich Voice
coil (ISV)
- 280 W AES power handling
- External neodymium magnet assembly
- Single Demodulating Ring (SDR) for lower
distortion
- Weather protected cone and plates for
outdoor usage
- Suitable for line arrays and compact two
way systems
022088N400 8ohm
022086N400 16ohm
022084N400 4ohm
Description
The 8NMB420 neodymium transducer has been developed
in response to a specific market requirement for a
8” midbass driver that combines excellent linearity
with good efficiency and high power handling
capabilities.
8NMB420 is primarily intended for use as a midbass
driver in compact 2-way or multiway reflex
enclosures comprising line arrays. The parameters
had been chosen to offer significant low frequency
output in vented enclosure with size starting from
20 lit. with a tuning frequency around 60Hz. The low
pass filter might be positioned as high as
2000-2500Hz. Multiple 8NMB420 units might be used:
the compact size reflects in the capability to have
precise attack time. This characteristic makes it
the ideal choice for stage monitoring and bass
guitar amplification.
The extremely powerful external neodymium magnet
assembly assures high flux concentration, low power
compression and excellent heat exchange. The levels
of force factor and power handling are, as a
consequence, at the upper professional level with
best power to weight ratio.
The exclusive dedicated double roll surround design
offers enhanced linear travel and control, in order
to reproduce precisely low frequency. The
curvilinear paper cone is formed using a unique wood
pulp composition designed to achieve the best
possible rigidity and stiffness.
The 50mm inside outside aluminum voice coil employs
Interleaved Sandwich Voice coil (ISV) technology. It
is composed by a high strength fiberglass former
used to carry windings on both the outer and inner
surfaces to achieve a mass balanced coil. This
results in an extremely linear motor assembly which,
in conjunction with the highly advanced design of
the magnetic structure, provides a high force factor
or BL. The voice coil is cooled incorporating
airways between the chassis back plate and the
magnet faceplate so that heated air is channeled
away from the voice coil and gap and dissipated by
the chassis basket.
Thanks to the increasing use during outdoor audio
events, the ability to perform in humid environments
is a key feature of the 8NMB420. This is achieved
trough a proprietary humidity repellent cone
treatment without a moving speaker mass increase.
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